diff --git a/jenkins/release.groovy b/jenkins/release.groovy
index d25d308..64c9488 100644
--- a/jenkins/release.groovy
+++ b/jenkins/release.groovy
@@ -1,6 +1,8 @@
 stage('Upload to github')
 {
     node('ActiveClientWindowsBuilder') {
+        deleteDir()
+        checkout scm
         withPythonEnv('python') {
             withCredentials([usernamePassword(credentialsId: 'github_friendsofgalaxy', usernameVariable: 'GITHUB_USERNAME', passwordVariable: 'GITHUB_TOKEN')]) {
                 bat 'pip install -r jenkins/requirements.txt'